#!/bin/sh
-. git-sh-setup || dir "Not a git archive"
-usage() {
- echo >&2 'usage: git bisect [start|bad|good|next|reset|visualize]
-git bisect start reset bisect state and start bisection.
+USAGE='[start|bad|good|next|reset|visualize|replay|log|run]'
+LONG_USAGE='git bisect start [<pathspec>] reset bisect state and start bisection.
git bisect bad [<rev>] mark <rev> a known-bad revision.
git bisect good [<rev>...] mark <rev>... known-good revisions.
git bisect next find next bisection to test and check it out.
git bisect reset [<branch>] finish bisection search and go back to branch.
-git bisect visualize show bisect status in gitk.'
- exit 1
+git bisect visualize show bisect status in gitk.
+git bisect replay <logfile> replay bisection log.
+git bisect log show bisect log.
+git bisect run <cmd>... use <cmd>... to automatically bisect.'
+
+. git-sh-setup
+require_work_tree
+
+sq() {
+ @@PERL@@ -e '
+ for (@ARGV) {
+ s/'\''/'\'\\\\\'\''/g;
+ print " '\''$_'\''";
+ }
+ print "\n";
+ ' "$@"
}
bisect_autostart() {
}
bisect_start() {
- case "$#" in 0) ;; *) usage ;; esac
#
# Verify HEAD. If we were bisecting before this, reset to the
# top-of-line master first!
#
- head=$(readlink $GIT_DIR/HEAD) || die "Bad HEAD - I need a symlink"
+ head=$(GIT_DIR="$GIT_DIR" git-symbolic-ref HEAD) ||
+ die "Bad HEAD - I need a symbolic ref"
case "$head" in
- refs/heads/bisect*)
- git checkout master || exit
+ refs/heads/bisect)
+ if [ -s "$GIT_DIR/head-name" ]; then
+ branch=`cat "$GIT_DIR/head-name"`
+ else
+ branch=master
+ fi
+ git checkout $branch || exit
;;
refs/heads/*)
+ [ -s "$GIT_DIR/head-name" ] && die "won't bisect on seeked tree"
+ echo "$head" | sed 's#^refs/heads/##' >"$GIT_DIR/head-name"
;;
*)
- die "Bad HEAD - strange symlink"
+ die "Bad HEAD - strange symbolic ref"
;;
esac
rm -f "$GIT_DIR/refs/heads/bisect"
rm -rf "$GIT_DIR/refs/bisect/"
mkdir "$GIT_DIR/refs/bisect"
+ {
+ printf "git-bisect start"
+ sq "$@"
+ } >"$GIT_DIR/BISECT_LOG"
+ sq "$@" >"$GIT_DIR/BISECT_NAMES"
}
bisect_bad() {
0)
rev=$(git-rev-parse --verify HEAD) ;;
1)
- rev=$(git-rev-parse --verify "$1") ;;
+ rev=$(git-rev-parse --verify "$1^{commit}") ;;
*)
usage ;;
esac || exit
- echo "$rev" > "$GIT_DIR/refs/bisect/bad"
+ echo "$rev" >"$GIT_DIR/refs/bisect/bad"
+ echo "# bad: "$(git-show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
+ echo "git-bisect bad $rev" >>"$GIT_DIR/BISECT_LOG"
bisect_auto_next
}
esac
for rev in $revs
do
- rev=$(git-rev-parse --verify "$rev") || exit
+ rev=$(git-rev-parse --verify "$rev^{commit}") || exit
echo "$rev" >"$GIT_DIR/refs/bisect/good-$rev"
+ echo "# good: "$(git-show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
+ echo "git-bisect good $rev" >>"$GIT_DIR/BISECT_LOG"
done
bisect_auto_next
}
}
bisect_auto_next() {
- bisect_next_check && bisect_next
+ bisect_next_check && bisect_next || :
}
bisect_next() {
bad=$(git-rev-parse --verify refs/bisect/bad) &&
good=$(git-rev-parse --sq --revs-only --not \
$(cd "$GIT_DIR" && ls refs/bisect/good-*)) &&
- rev=$(eval "git-rev-list --bisect $good $bad") || exit
+ rev=$(eval "git-rev-list --bisect $good $bad -- $(cat "$GIT_DIR/BISECT_NAMES")") || exit
if [ -z "$rev" ]; then
echo "$bad was both good and bad"
exit 1
git-diff-tree --pretty $rev
exit 0
fi
- nr=$(eval "git-rev-list $rev $good" | wc -l) || exit
+ nr=$(eval "git-rev-list $rev $good -- $(cat $GIT_DIR/BISECT_NAMES)" | wc -l) || exit
echo "Bisecting: $nr revisions left to test after this"
echo "$rev" > "$GIT_DIR/refs/heads/new-bisect"
- git checkout new-bisect || exit
+ git checkout -q new-bisect || exit
mv "$GIT_DIR/refs/heads/new-bisect" "$GIT_DIR/refs/heads/bisect" &&
- ln -sf refs/heads/bisect "$GIT_DIR/HEAD"
+ GIT_DIR="$GIT_DIR" git-symbolic-ref HEAD refs/heads/bisect
+ git-show-branch "$rev"
}
bisect_visualize() {
bisect_next_check fail
- gitk bisect/bad --not `cd "$GIT_DIR/refs" && echo bisect/good-*`
+ not=`cd "$GIT_DIR/refs" && echo bisect/good-*`
+ eval gitk bisect/bad --not $not -- $(cat "$GIT_DIR/BISECT_NAMES")
}
bisect_reset() {
case "$#" in
- 0) branch=master ;;
- 1) test -f "$GIT_DIR/refs/heads/$1" || {
+ 0) if [ -s "$GIT_DIR/head-name" ]; then
+ branch=`cat "$GIT_DIR/head-name"`
+ else
+ branch=master
+ fi ;;
+ 1) git-show-ref --verify --quiet -- "refs/heads/$1" || {
echo >&2 "$1 does not seem to be a valid branch"
exit 1
}
*)
usage ;;
esac
- git checkout "$branch" &&
- rm -fr "$GIT_DIR/refs/bisect"
- rm -f "$GIT_DIR/refs/reads/bisect"
+ if git checkout "$branch"; then
+ rm -fr "$GIT_DIR/refs/bisect"
+ rm -f "$GIT_DIR/refs/heads/bisect" "$GIT_DIR/head-name"
+ rm -f "$GIT_DIR/BISECT_LOG"
+ rm -f "$GIT_DIR/BISECT_NAMES"
+ rm -f "$GIT_DIR/BISECT_RUN"
+ fi
}
+bisect_replay () {
+ test -r "$1" || {
+ echo >&2 "cannot read $1 for replaying"
+ exit 1
+ }
+ bisect_reset
+ while read bisect command rev
+ do
+ test "$bisect" = "git-bisect" || continue
+ case "$command" in
+ start)
+ cmd="bisect_start $rev"
+ eval "$cmd"
+ ;;
+ good)
+ echo "$rev" >"$GIT_DIR/refs/bisect/good-$rev"
+ echo "# good: "$(git-show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
+ echo "git-bisect good $rev" >>"$GIT_DIR/BISECT_LOG"
+ ;;
+ bad)
+ echo "$rev" >"$GIT_DIR/refs/bisect/bad"
+ echo "# bad: "$(git-show-branch $rev) >>"$GIT_DIR/BISECT_LOG"
+ echo "git-bisect bad $rev" >>"$GIT_DIR/BISECT_LOG"
+ ;;
+ *)
+ echo >&2 "?? what are you talking about?"
+ exit 1 ;;
+ esac
+ done <"$1"
+ bisect_auto_next
+}
+
+bisect_run () {
+ # Check that we have everything to run correctly.
+ test -d "$GIT_DIR/refs/bisect" || {
+ echo >&2 'You need to start by "git bisect start".'
+ echo >&2 'And then by "git bisect bad" and "git bisect good".'
+ exit 1
+ }
+ bisect_next_check fail
+
+ while true
+ do
+ echo "running $@"
+ "$@"
+ res=$?
+
+ # Check for really bad run error.
+ if [ $res -lt 0 -o $res -ge 128 ]; then
+ echo >&2 "bisect run failed:"
+ echo >&2 "exit code $res from '$@' is < 0 or >= 128"
+ exit $res
+ fi
+
+ # Use "bisect_good" or "bisect_bad"
+ # depending on run success or failure.
+ if [ $res -gt 0 ]; then
+ next_bisect='bisect_bad'
+ else
+ next_bisect='bisect_good'
+ fi
+
+ # We have to use a subshell because bisect_good or
+ # bisect_bad functions can exit.
+ ( $next_bisect > "$GIT_DIR/BISECT_RUN" )
+ res=$?
+
+ cat "$GIT_DIR/BISECT_RUN"
+
+ if [ $res -ne 0 ]; then
+ echo >&2 "bisect run failed:"
+ echo >&2 "$next_bisect exited with error code $res"
+ exit $res
+ fi
+
+ if grep "is first bad commit" "$GIT_DIR/BISECT_RUN" > /dev/null; then
+ echo "bisect run success"
+ exit 0;
+ fi
+
+ done
+}
+
+
case "$#" in
0)
usage ;;
bisect_visualize "$@" ;;
reset)
bisect_reset "$@" ;;
+ replay)
+ bisect_replay "$@" ;;
+ log)
+ cat "$GIT_DIR/BISECT_LOG" ;;
+ run)
+ bisect_run "$@" ;;
*)
usage ;;
esac